Technical data

4-11 Pump Operation
Drain pump operates only in Cool and Dry Mode.
The float switch used for water level detection is closed under normal condition, and is open when wat
e
overflow.
For the NEC version of MCU, the "Overflow" and “Normal” conditions are indicated by a logic “0” and
“1” at the float switch pins connector respectively.
For the Fujitsu version of MCU, the "Overflow" and “Normal” condition are indicated by a logic “1” and
“0” at the float switch pins connector respectively. The overflow condition can activate the water pump i
n
Standy and operating modes
ON
OFF
ON
COMP
(WVL)
PUMP
OFF
ON
OPER
LED
OFF
Overflow
Water Level
Normal
BLINK
COMP/WVL is
forced OFF
8 min 8 min
Overflow when
unit is ON
Overflow when
unit is OFF
1 min
19